FKBP4 and neoplasm: An immunohistochemistry study of expression of FKBP51 in 50 tumoral samples including breast, lung, pancreas, ovary, and prostate (10 samples for each tumor), and a comparable number of normal tissue samples showed an intense signal in 38 out of 50 tumors analyzed, whereas normal tissues of the same histotypes showed a weak/absent immunohistochemical signal [51].